color plate 18 (b) (a) (d) (c) (f) (e) (g) Greenhouse irrigation: (a) Automated irrigation boom can be programmed to deliver different amounts of water to different crops as it travels the length of the greenhouse. (b) Overhead sprinkler irrigation system. (c) Irrigation carrousel for hanging baskets; an irrigation point can service an entire string of hanging baskets as they are automatically moved one-by-one past the irrigation point. (d) Components of a fertilizer and acid injection system. Bag Culture: (e) Tomato plants growing in rockwool bags; these plants are drip-irrigated. (f) Fruiting tomato plants; the spindly stems are supported by strings dropped from the roof. The two hot water pipes located on the floor between plant rows are also used as tracks fro carts for general maintenance and harvesting of fruits. (g) Ripe tomato fruits packaged for the market. (Sources: Photos a–d are courtesy of Dr. A.J. Both, Ph.D. Bioresource Engineering, Department of Plant Biology and Pathology, Rutgers University, New Brunswick, NJ: photos e–g, are courtesy of Dr. Louis D. Albright, Professor of Biological and Environmental Engineering and Stephen H. Weiss Presidential Fellow, Cornell University, Ithaca, NY.)